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Alternatives & Ideas ? - 'On/Off' Switches
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 Posted: Wed Dec 30th, 2020 10:08 am
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Budd
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For my H0 trains,
I really like the Deltang RX62 with the turn on/off reed-switch,
but they look like they will be discontinued.

I have used a RX60 with a separate on/off switch,
but I wasn't overly happy with that arrangement,
I had to pick the loco up to turn it on/off.


So what have others used for on/off switches ?

Just looking for ideas,
and see how others have done this for some inspiration.


Wayne from Oz




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 Posted: Wed Dec 30th, 2020 12:23 pm
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Toeffelholm
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Hi


In pre DelTang times I used this solution

Toeffelholm magic switch

I only fear that it will be difficult to find these switches.

But with some patience you could build them by yourself,
if you apply a fitting weak magnet to the glass tube.



Nowadays I think I would prefer Bob's solution.

Bob R.'s magnetic switch


Juergen




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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Wed Dec 30th, 2020 04:57 pm
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Helmut
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You can obtain it from Mouser

Part#  876-KSK-1E661BV14501

$10.60c




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 Posted: Thu Dec 31st, 2020 12:26 am
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Rod Hutchinson
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I have made some homemade on/off reed-switches. 

Depending on the reed-switch,
they require a low magnetic field for their not normal position. 

I am a bit worried the switch will 'unlock' itself,
from a mechanical or electromagnetic jolt.

Would those who have used them report on their reliability please?




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Rod Hutchinson
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 Posted: Thu Dec 31st, 2020 08:02 am
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Toeffelholm
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Rod


As long as I used them they worked reliably.


These special reed-switches open again,
if you apply an opposite magnetic field.

So you mount them away from other magnetic fields,
like track e.g. magnets or motor.

I placed them in the roof.


The magnet that you bound to the reed,
should be just weak enough that it doesn’t close the reed.

So homemade ones may need some testing.


Juergen




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modelling in 1:22.5 on 32mm and 16.5mm track
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 Posted: Thu Dec 31st, 2020 12:47 pm
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Rod Hutchinson
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Hi Juergen

I have a range of sizes of small rare earth magnets,
and selected one which was successful.

I intended to use them to power battery-on-board LEDs,
in passenger and brake stock for night running,
but chickened out. 

Maybe I can retrofit them.




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Rod Hutchinson
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 Posted: Thu Dec 31st, 2020 11:27 pm
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bobquincy
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Here is a solid-state version, possibly more reliable...

https://www.digikey.com/en/products/detail/allegro-microsystems/A1220LUA-T/2138531

boB




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 Posted: Fri Jan 1st, 2021 12:41 am
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Rod Hutchinson
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bobquincy wrote:
Here is a solid-state version, possibly more reliable.


I didn't know some hall-effect switches had latching capacity. 

That is brilliant. 

If the scale is OK you could mount them externally and make them look like a box.




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Rod Hutchinson
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 Posted: Fri Jan 1st, 2021 10:33 am
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Helmut
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But don't forget that when applying this,

you need some additional electronics.


Maybe even a relay, and a power supply for it,

which must be on all the time for it to work properly.




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 Posted: Fri Jan 1st, 2021 10:39 am
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Rod Hutchinson
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Should they drive an LED?







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Rod Hutchinson
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